四分律比丘含注戒本 2.233

2.233

For bhikṣuṇīs and others, it is a duṣkṛta. Non-offences: if the bhikṣu has a companion; if there is a knowledgeable person present, or two persons who are neither blind nor deaf; if he trips and falls while passing through; if he is ill; if he is restrained by physical force; or during dangers to life or celibacy—all are permitted.